package com.galaxy.commom.base.holder;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * 上下文获取
 * @author caijinbang
 * @date 2018/10/28 01:27
 */
@Component
public class SpringContextHolder  implements ApplicationContextAware {

  private static ApplicationContext applicationContext;

  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    SpringContextHolder.applicationContext = applicationContext;
  }

  /**
   * 获取applicationContext
   * @return
   */
  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  /**
   * 通过name获取 Bean.
   * @param name
   * @return
   */
  public static Object getBean(String name){
    return getApplicationContext().getBean(name);
  }

  /**
   * 通过class获取Bean
   * @param clazz
   * @param <T>
   * @return
   */
  public static <T> T getBean(Class<T> clazz){
    return getApplicationContext().getBean(clazz);
  }

  /**
   * 通过name,以及Clazz返回指定的Bean
   * @param name
   * @param clazz
   * @param <T>
   * @return
   */
  public static <T> T getBean(String name,Class<T> clazz){
    return getApplicationContext().getBean(name, clazz);
  }

}
